window.onload = function() {
	var btn = document.querySelector("button");
	var taichi = document.querySelector(".taichi");
	var flag = true;
	btn.onclick = function() {
		if (flag) {
			taichi.style.animationPlayState = "paused";
		} else {
			taichi.style.animationPlayState = "running";
		}
		flag = !flag;
	}
}
